find your own style. I fight at 72kg, but i usually study the lighter guys, like light weights becaue they have all the moves, some have big power. Its a good division becaue at that weight they need to have a high work rate, so there is lots of skill, they have footwork, head movement, good defence and some fighters still have 1 punch knock out power. im talking about top fighters
Given your height, stance and chosen weight class, Hagler would be an excellent guy to study. He never fought at LHW but he had to cope with many of the height disadvantages you'll probably have to deal with in the modern LHW era.
"I'm a 5'10" light heavyweight southpaw with great technique and punching power" Man. from the sounds of it- which great fighters should be studying you!??! keep up the awesomeness- "great techique and punching power"